7 Mistakes SMBs Make When Migrating to Microsoft 365 (and How to Avoid Them)
Microsoft 365 can transform your productivity, or become a nightmare if the migration is done wrong. These are the most costly mistakes we see over and over.
Microsoft 365 is, without a doubt, the most powerful productivity platform available for SMBs today. Business email, Teams, SharePoint, OneDrive, the Office apps: everything integrated and in the cloud.
But there's a problem: most migrations are done wrong.
Not because of the technology. Because of the planning. After migrating dozens of Dominican businesses to Microsoft 365, these are the 7 mistakes we see again and again, and what we do differently.
In short: The most costly mistakes are not taking inventory, not training the team, ignoring security, not planning the DNS, forgetting backup (Microsoft does NOT back up your data), buying the wrong plan, and using only email when you're paying for much more.
Mistake #1: Migrating without an inventory
"Just move the emails and files." It sounds simple. But how many mailboxes are there? How many GB of data? Are there shared accounts? Distribution lists? Email aliases?
What we do: Before touching anything, we take a complete inventory: mailboxes, sizes, mail rules, aliases, shared folders, permissions. This prevents surprises on migration day.
Mistake #2: Not training the team
On migration day you tell your team: "Now use Outlook on the web." And you expect everything to work. The result: frustration, resistance to change, and productivity plummeting for weeks.
What we do: Training sessions before, during and after. They don't need to be long. 45 minutes focused on what each team actually needs.
Mistake #3: Ignoring security from the start
Microsoft 365 comes with powerful security tools: two-step verification, conditional access policies, protection against fraudulent emails. But none of them are active by default on most plans.
What we do: Configure security from day 1:
- Mandatory two-step verification for everyone
- Strong password policies
- Anti-phishing protection enabled
- Suspicious sign-in alerts
Mistake #4: Not planning the DNS
Changing mail records without planning can result in lost emails, periods without email, or delivery problems that last for days. For an SMB that depends on email, this can mean lost business.
What we do: A DNS migration plan with clear change windows, a reduced TTL before the change, and follow-up monitoring to confirm everything works.
Mistake #5: Forgetting backup ⚠️
Here's the surprise nobody expects: Microsoft does NOT back up your data. Its responsibility is for the platform to be available, not for your information to be protected.
If an employee accidentally deletes files, if ransomware encrypts your OneDrive, if an administrator deletes a mailbox... Microsoft won't recover it for you. This surprises most companies that migrate.
What we do: Implement automatic third-party backup from day one. Your emails, files and Teams data are backed up 3 times a day with granular restore. You can recover a specific email from 6 months ago in minutes.
Want to understand better why your current backup probably isn't working? Read this article.
Mistake #6: Buying the wrong plan
Microsoft 365 has multiple plans: Business Basic, Business Standard, Business Premium, Enterprise... Each with different features and prices. We've seen companies paying double for features they never use, and others saving pennies that end up costing them dearly.
What we do: An analysis of real needs before choosing a plan. Do you need the desktop apps? Do you need device management? How many users are there? The right plan saves you money and gives you exactly what you need.
Mistake #7: Treating it as "just email"
Microsoft 365 is much more than email. Teams can replace your phone system. SharePoint can be your intranet. Power Automate can automate repetitive processes. But if you only move mailboxes, you're using 20% of what you paid for.
What we do: A gradual adoption strategy. First email, then OneDrive for files, then Teams for communication, then SharePoint for collaboration. Step by step, without overwhelming the team.
The result of a well-done migration
When done correctly, migrating to Microsoft 365 gives you:
- Reliable business email with 50GB per mailbox
- Real-time collaboration: your team works on the same document without emailing versions back and forth
- Files accessible from anywhere: office, home or phone
- Enterprise-grade security with two-step verification and anti-phishing protection
- Predictable costs with monthly per-user licensing
And the cost of doing the migration wrong? Easily 2-3 weeks of affected productivity, lost emails, and a frustrated team. The difference between a good and a bad migration isn't the technology. It's who plans it.
Thinking about migrating?
We've migrated companies from 5 to 200 users, all without losing a single email. If you're considering Microsoft 365, or if you've already migrated and something didn't turn out right, let's talk before these mistakes cost you more.
Still evaluating whether you need an outside team for your technology? This article can help you decide.